var Sound = function (sources, radius, volume) {
    var audio = document.createElement('audio');
    for (var i = 0; i < sources.length; i++) {
        var source = document.createElement('source');
        source.src = sources[ i ];
        audio.appendChild(source);
    }
    //this.position = new THREE.Vector3();
    this.play = function () {
        audio.play();
    }
    /*this.update = function (camera) {
        var distance = this.position.distanceTo(camera.position);
        if (distance <= radius) {
            audio.volume = volume * ( 1 - distance / radius );
        } else {
            audio.volume = 0;
        }
    }*/
}